Summary: A wolf howls. A wolf is in a cage. Dr. Cameron has the
slow-witted Petro strapped down. The wolf is "serving science." Cameron
injects Petro, who transforms while Cameron triumphantly address his
former detractors in his imagination. Petro is "no longer human," "lusting
for the kill." Since Cameron was declared a "madman," he lost his chair
at the university. Those "stupid fools!" The application for this was to
be WWII-related, "an army of wolf-men." Cameron would have an antidote
after the marauding, but one of the imaginary men asks so what: how could
you round up a million insane half-animal killers? These men took away
all he held dear: "position, honor, respect." And they "shall die, one
by one."

Petro is injected and changes back, claiming to have had a dream of
countryside murderous chasing. We meet Cameron's Judy-Garland-voiced
daughter Lenora, and her reporter boyfriend. She wants to return to the
city. Petro wishes he had "book-larnin'." He is transformed again and
this time unchained to wander the swamps. A farmer shoots at him, but
cackling insane corncob-pipe-smoking Grandmother says one must use a
silver bullet. The wolfman enters a window and kills a brat, then wanders
back to the lab. Cameron commands him to "lie down." He threatens with a
whip, and injects Petro back. Next, we'll go after Professor Blaine.

Cameron stops his daughter from sending out a letter. A posse of farmers
is hunting the murderer, and Petro frets. Cameron is intrigued since the
act was unprovoked and required opening the window.

Tom the reporter visits Blaine, but then Cameron does, and old hostilities
are renewed, regarding "tampering with the laws of nature." But Petro is
Cameron's "guinea pig" and will prove his theories. An arranged call from
Lenora gets Cameron off the scene; Blaine is supposed to give Petro a
second injection later. Blaine first calls over Fitzgerald, and Cameron
visits him too to fetch him to Blaine's place to see the proof of his
success. Cameron feigns heart troubles so that Fitzgerald comes upon the
scene of Blaine having been killed.

Petro begins processing his feelings for Lenora. Cameron intervenes and
slaps him. Lenora says Petro had the "eyes of a wild beast," that he acted
as if "possessed by a demon." Petro wanders into the swamps, and Tom the
reporter finds his way to the house. "I see no reason for rejoicing," is
Cameron's curt comment. He hates "snooping" reporters and finds it an
obnoxious profession. Tom visits a farmer concerning the beast/murderer,
and is told, "It scared Jed Harper so bad he went and got religion."

Wolfman Petro returns, and Cameron momentarily considers shooting him dead,
but no, we still have to murder Fitzgerald.

The farmer is murdered. The old lady squawks about using a silver bullet
again. Cameron apologizes to Tom. Tom questions Petro. Fitzgerald comes
to the lab and listens to Cameron blab about volatile elements in the blood.
He rants about controlling evolution, finding the source of life itself.
Fitzgerald leaves in a huff, but agrees to drive Petro to town on his way.
Petro transforms in the car and attacks, and is next seen carrying Fitzgerald
in the swamps. The posse of farmers fire at the wolfman, and Fitzgerald is
still alive, to be taken back to Cameron's house. Tom finds out Petro was
with Fitz, who suddenly is discovered dead. Tom gets aggressive with Cameron.
Lenora enters the lab and sees the straps on the cot. She opens a door and
sees the wolfman. Tom arrives and throws a chair. Lightning starts a fire
as the wolfman pursues the others upstairs. The monster sees Cameron and
we see that murder in silhouette. Tom and Lenora get out of the burning house.

Commentary: What does one farm in swamps?
What about killing Hatfield and Warwick?
Interestingly, throughout this film, people are "snapping"
at each other.